Vulnerability CVE-2021-21686


Published: 2021-11-04

Description:
File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.

Type:

CWE-59

(Improper Link Resolution Before File Access ('Link Following'))

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.8/10
4.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Jenkins -> Jenkins 

 References:
https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455

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